Malicious RTF — malware analysis report

Static analysis result for SHA-256 853beed8e48acfb9…

MALICIOUS

RTF

8.2 KB First seen: 2018-10-19
MD5: 20fa3f858b9b370c45de50620ecdb0c0 SHA-1: fcd88f639f4283611fc8269b9baf232d2f9f42c5 SHA-256: 853beed8e48acfb98a484b8de3569018277bcb9c582f258dff413f69a04c4275
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object, specifically identified as an exploit targeting Microsoft Equation Editor (CVE-2017-11882). This exploit is designed to execute arbitrary code on the victim's machine, likely leading to the download and execution of a secondary payload. The ClamAV detection name directly confirms the exploitation of this known vulnerability.

Heuristics 4

  • Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 4152 bytes
SHA-256: cfe91669bbb46f41a2f07f9c3ef6eff99f62cabca72a464061523009679d8a00

Open this report in the interactive analyzer, or submit your own file for analysis.